/Engine/Source/Runtime/Engine/Classes/Engine/World.h
Get a Subsystem of specified type
[UWorldSubsystem](API\Runtime\Engine\Subsystems\UWorldSubsystem) * GetSubsystemBase ( [TSubclassOf](API\Runtime\CoreUObject\Templates\TSubclassOf)< [UWorldSubsystem](API\Runtime\Engine\Subsystems\UWorldSubsystem) > SubsystemClass ) const